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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why do we have another cartridge filled with oil fitted at the bottom silica gel cartridge in power transforers

 1 2757

why transformer rating is mentioned in kva?

JK Electric Works,

1 3781

what is the formulae of calculating voltage drop?

 2 3855

High Voltage out door substation-annual maintenance, things to be considered

 1 3323

How much current can a 3-1/2 core 100 mm wire carry?

Epitome, Focus, Focus Energy,

3 31633

1 hp single phase motor is more likely to get hot thsn inone hp 3 phase motor its true or false? If true why?

Focus, Focus Energy,

3 23392

Whis machine is having higher efficiency Transformer or Generator

 2 3728

What is the latest generation of circuit breakers called?

Epitome, Focus Energy, Jakson, KDC, L&T,

3 22176

What are the special cables required for explosion proof wiring?

IVRCL,

2 15624

What is the similarity and what is the difference between relays and PLC?

NTPC,

3 27069

The company is wiling to buy you 5 pcs of equipments in your electrical tool kit. Plz tell what are the 5 things you want?

 3 23813

Suppose an electric motor with a controller is not working. What is the sequence of testing you will do in your troubleshooting?

Emerson,

2 23585

how the BDV of the oil will be checked using moterised controled HV SET?

 1 2906

What is an Isolation Transformer? Where it will use?

 3 4258

What is the latest generation of circuit breakers called?

Focus, OPTCL,

1 5185

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Un-Answered Questions { Electrical Engineering }

1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

1588

How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?

1368

How many types of oil using in H/T & L/T Oil Circuit Breakers. need Explenation ?

2331

ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant

5636

What mean by MLTP

3421




1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?

1660

can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?

881

briefly explain principle of resistance welding

1405

wHAT IS CAPACITANCE LATCHING? hOW TO CALCULATE CAPACITANCE LATCHING? hOW TO SOLVE THE PROBLEM IF CAPACITANCE LATCHING APPLIED?

1536

Why corona leads to production of Ozone and glow of the color VOILET?

1493

Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

1475

Difference between HRG and NGR. Are they both the same thing

3637

What type of core material is used for metering C.T and protection C.T???

1681

Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,

1208

WHAT WOULD BE THE FORMULA OF WIRE GAUGE FOR A FULL LOAD CURRENT

1682

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